feat: Add stale process monitor, users route, landing page, archive old scripts

- Add backend stale process monitoring API (/api/stale-processes)
- Add users management route
- Add frontend landing page and stale process monitor UI on /scraper-tools
- Move old development scripts to backend/archive/
- Update frontend build with new features

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/archive/run-location-migration.js

@@ -0,0 +1,45 @@
+const { Pool } = require('pg');
+
+const pool = new Pool({
+  connectionString: process.env.DATABASE_URL || 'postgresql://kelly:kelly@localhost:5432/hub'
+});
+
+(async () => {
+  try {
+    console.log('🔄 Running location migration...');
+
+    await pool.query(`
+      ALTER TABLE proxies
+      ADD COLUMN IF NOT EXISTS city VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS state VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS country VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS country_code VARCHAR(2),
+      ADD COLUMN IF NOT EXISTS location_updated_at TIMESTAMP
+    `);
+
+    console.log('✅ Added columns to proxies table');
+
+    await pool.query(`
+      CREATE INDEX IF NOT EXISTS idx_proxies_location ON proxies(country_code, state, city)
+    `);
+
+    console.log('✅ Created location index');
+
+    await pool.query(`
+      ALTER TABLE failed_proxies
+      ADD COLUMN IF NOT EXISTS city VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS state VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS country VARCHAR(100),
+      ADD COLUMN IF NOT EXISTS country_code VARCHAR(2),
+      ADD COLUMN IF NOT EXISTS location_updated_at TIMESTAMP
+    `);
+
+    console.log('✅ Added columns to failed_proxies table');
+    console.log('✅ Migration complete!');
+
+    process.exit(0);
+  } catch (error) {
+    console.error('❌ Migration failed:', error);
+    process.exit(1);
+  }
+})();